[Freeswitch-users] External profile & NAT

[ocset]

Hi

I would like to allow a person with a softphone app to register with 
Freeswitch (extension 1111) when they are outside the office network.

I would like to to implement this using an external profile. According 
to the wiki page (http://wiki.freeswitch.org/wiki/External_profile) I 
just need to create a copy of the "conf/sip_profiles/external.xml" file 
and change the port number to 5090 (and also open the port on the 
modem). When I do a "sofia status", this new gateway does not show up 
and to be honest, I don't quite understand how that works and what else 
to read to make sense of what to do.

What are the ways in which other Freeswitch admins are granting access 
to external devices?

ps. just to confirm, do I set external_rtp_ip and external_sip_ip to the 
fix IP address that my ISP has given me - the one that is shown by 
www.whatsmyip.org?

Please help
Thanks
O.